I've had issues with my Lippert 6 point 3.0 leveling system for over a year. It kept RF errors and like you, would only run for one second and stop. I tried extending them all 6 inches and then retracting. I limped it along and somehow, was always able to get the system to "just" reach level (the center dot on the control panel) and then it would go into an error and the two middle jacks would not go down then.
I limped this along for over a year, thinking I'd figure it.
Then, February (2024) while doing a camp host position in Louisiana, I needed to relevel my camper after sitting on soft gravel for 6 weeks. The system would not level. Again, one second, one second, one second. I absolutely could not clear the errors, and then it started throwing all kinds of different errors.
We knew in another few weeks we'd have to eventually leave the park and I really needed those jacks working. At this point, I couldn't even get the camper to raise correctly to even hitch up.
Being stuck in such a position, I decided to call an RV mobile tech. He finally did come out and after spending several HOURS trying to make sense of the whole matter, he finally figured it out, I had a broken right front landing jack.
He ordered me a new jack and came out again about a week later and installed it. My jacks have worked great ever since.
Sorry my friend, but based on your description, your front landing jack is broken. The gears are broken and unfortunately, you cannot just replace the gears. You have to purchase the entire leg with the motor from Lippert.
If you can get the front of the camper up on blocks, or raise it enough to hitch, you can then have the weight of the camper off the front jacks for a new install. Actually, it is quite easy, not rocket science to replace on of the front landing jack legs. Simply unbolt from the U bracket, unplug the wires and pull it out. Put the new one in and bolt it back up (exactly as it came out) and plug it back in.
Now, do the 6 inch, lower all the legs reset trick and you'll be good to go.
but, those legs now cost $600. I replaced the other site about 4 years ago when it broke. I did it myself because I was 100% positive it had stripped gears. Back then, the entire leg assembly with motor cost only $250 and I got it from a local dealership, who ordered it from Lippert for me.
Inflation is killing us. But, (again)... sorry, your problem sounds like a broken gear in your leg.
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2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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